A shocking video shows the moment a man tricked his pal into thinking he had killed someone after performing a scare prank on an old man.

In the video, the young man is seen dressed in a white rabbit costume as he jumps out from alleyways and street corners to frighten unsuspecting members of the public.

But while it all seems like fun and games at first, things soon take a drastic turn as he jumps out on and old man and his daughter.

Prankster: Man jumps out on an old man and his daughter dressed in a white rabbit suit (Photo: YouTube)

Moments after being 'scared' by the rabbit, the elderly man clutches at his chest before apparently sinking to the pavement in pain.

Panicking, the group, known on YouTube as The Royal Stampede, then help the man into his daughter's car before they follow the vehicle to the nearby hospital in Adelaide, Australia.

But the man's friends decided that the prank hadn't yet gone far enough.

They then set up a phone call from the man's daughter, who sobs that her father had passed away in the hospital.

Dramatic: But the prankster finds the joke is on him after the elderly man fakes a heart attack (Photo: YouTube)

Distraught, the prankster - still dressed in the white rabbit suit - covers his face as he bursts into tears, describing the scene as "the worst night of my life".

Thankfully, his friends eventually decide to reveal all as the man and his daughter walk through the hospital car park to greet him.

And it's safe to say, he's not too happy about the stress his so-called friends have put him through, letting out a barrage of expletives before eventually congratulating the man and his daughter on their 'performance'.